This Eastern White Pine Tree had a major
wound. The tree
set a barrier zone separating the tree at the time of wounding from the growth
after that time. Then carpenter ants, respecting
boundaries, created
galleries within the barrier zone, thus stalling rot or decay. Then a
pileated wood pecker created many cavities, with some connected. Now
shortly after the pileated wood pecker created the condo, the flying
squirrels (genus: Glaucomys) moved
in. I found them on 12-04-2007.